xrdp_idle_disconnection_poller.c

/*
 * Copyright 2018 HAW International, Inc.
 * Copyright 2018 Koichiro Iwao <meta@vmeta.jp> a.k.a metalefty on GitHub
 * 
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 * 
 *     http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

#include <X11/extensions/scrnsaver.h>
#include <X11/Xlib.h>
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>

#define MAX_IDLE_SEC 60

int main(void)
{
	Display *display;
	int event_base, error_base;
	XScreenSaverInfo info;
	int done = 0;
	unsigned long idle_msec = 0, past_idle_msec = 0;

	display = XOpenDisplay("");

	if (display == NULL)
	{
		fprintf(stderr, "Can't open display.\n");
		exit(EXIT_FAILURE);
	}

	if (XScreenSaverQueryExtension(display, &event_base, &error_base))
	{

		while(1)
		{
			XScreenSaverQueryInfo(display, DefaultRootWindow(display), &info); 
			past_idle_msec = idle_msec;
			idle_msec = info.idle;
			if (past_idle_msec > idle_msec)
			{
				done = 0;
			}
			
			if (info.idle >= MAX_IDLE_SEC * 1000 && done == 0)
			{
				system("xrdp-dis");
				done = 1;
			}
			sleep(1);
		}
	}
	else
	{
		fprintf(stderr,"XScreenSaverQueryExtension failed.\n");
		exit(EXIT_FAILURE);
	}


	printf("%d\n", info.idle);
	exit(EXIT_SUCCESS);
}